Bail out before allocating slides if file is empty

In load() we allocated slides before checking if we actually read
anything from the FILE fp and then continue with an allocated but
“empty” space wich would lead to errors.

1 files changed, 4 insertions, 4 deletions

diff --git a/sent.c b/sent.c
index f7cadb6..baf6d4f 100644
--- a/sent.c
+++ b/sent.c
@@ -413,10 +413,6 @@ void load(FILE *fp)
 
 	/* read each line from fp and add it to the item list */
 	while (1) {
-		if ((slidecount+1) * sizeof(*slides) >= size)
-			if (!(slides = realloc(slides, (size += BUFSIZ))))
-				die("cannot realloc %u bytes:", size);
-
 		/* eat consecutive empty lines */
 		while ((p = fgets(buf, sizeof(buf), fp)))
 			if (strcmp(buf, "\n") != 0 && buf[0] != '#')
@@ -424,6 +420,10 @@ void load(FILE *fp)
 		if (!p)
 			break;
 
+		if ((slidecount+1) * sizeof(*slides) >= size)
+			if (!(slides = realloc(slides, (size += BUFSIZ))))
+				die("cannot realloc %u bytes:", size);
+
 		/* read one slide */
 		maxlines = 0;
 		memset((s = &slides[slidecount]), 0, sizeof(Slide));